ATMXT288UD-AMTSPIVA1

Overview

The ATMXT288UD-AMTSPIVA1 is a maXTouch Adaptive Sensing Touchscreen Controller from Microchip Technology, designed for automotive applications. It features a unique charge-transfer acquisition engine supporting up to 288 nodes across 12 X and 24 Y lines. The device operates with SPI interface at speeds up to 8 MHz and supports I2C protocols. It accommodates mutual and self-capacitance measurements for robust touch detection, handling up to 10 concurrent touches. Operating within a temperature range of -40°C to +85°C, it utilizes a 56-pin VQFN package (7x7x0.9 mm). Key performance metrics include an initial touch latency under 12 ms and a typical report rate exceeding 70 Hz for five touches.

Feature Summary

• Supports up to 288 nodes with 12 transmit and 24 receive lines for multi-touch tracking.
• Integrated moisture compensation prevents false touches from condensation or water drops up to 22 mm diameter.
• Features Adjacent Key Suppression (AKS) technology to prevent false key activations.
• Complies with CISPR 25 standards and is AEC-Q100 qualified for automotive environments.

Applications

• Automotive touchscreen displays requiring high reliability and noise immunity.
• On-cell and touch-on-display solutions including TFT, LCD, and OLED panels.
• Systems utilizing discrete glass or PET film-based sensor stacks.
• Applications demanding gesture recognition and palm recovery algorithms.

Procurement Notes

Verify the specific ordering suffix 'SPI' confirms the Serial Peripheral Interface variant rather than I2C. Confirm the 'V' indicates the VQFN package type and 'A1' denotes the standard tray packaging configuration. Ensure the component meets the required Grade 3 temperature specifications (-40°C to +85°C) for your target environment before finalizing procurement.

Selection Notes

Select this controller when designing systems requiring SPI communication interfaces instead of I2C. It is suitable for displays up to 6.34 inches with a 2:1 aspect ratio using a 6 mm electrode pitch. Consider this part if the application requires support for both mutual and self-capacitance sensing modes to enhance robustness against environmental noise and interference.

Part Context

This component belongs to the mXT288UD-AMT/mXT288UD-AMB 1.0 family of maXTouch controllers. It shares core sensing capabilities with the I2C variant but differs in its digital communication interface. The device is part of Microchip's automotive-grade portfolio, developed following Automotive SPICE Level 3 certified processes to ensure quality and reliability in critical vehicle systems.

Replacement Considerations

The ATMXT288UD-AMTI2CVA1 serves as a functional alternative if the system design permits switching from SPI to I2C communication. Both variants share identical node counts, package dimensions, and core sensing algorithms. Verify that the host processor supports the required I2C clock speeds (up to 1 MHz Fast-mode Plus) before substituting.